28947300 has 72 divisors (see below), whose sum is σ = 85577856. Its totient is φ = 7551360.

The previous prime is 28947293. The next prime is 28947313. The reversal of 28947300 is 374982.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13074 + ... + 15126.

Almost surely, 2^28947300 is an apocalyptic number.

28947300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28947300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42788928).

28947300 is an abundant number, since it is smaller than the sum of its proper divisors (56630556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28947300 is a wasteful number, since it uses less digits than its factorization.

28947300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28947300 is about 5380.2695099781. The cubic root of 28947300 is about 307.0454650134.

The spelling of 28947300 in words is "twenty-eight million, nine hundred forty-seven thousand, three hundred".